Channeling machine



Apfil 5 19271' H. A; BALLRD CHANNELING MACHINE Filed Aug.l5, 1923 8 Sheets-Shui 1 BALLARD cH-ANNELNG MAcHINE Filed Aug 15. 192s April 5 1927.

1927. Apnl' 5 H. A. BALLARD CHANNELING MACHINE Filed Aug.l5, 1923 8 Sheets-Sheet 4 1,623,226 vApril 5 1927' H, A. BALLARD CHANNELING MACHINE Filed Aug.15, 1923 8 sheets-sheet 5 192 April 5 7 H. A. BALLARD GHANNELING MACHINE 8 Sheets-Sheet 6 Filed Aug. 15, 1923 il 1927. l 623 226 Apr 5 H. A. BALLARD CHANNELING MACHINE l Filed Aug.15. 1923 8 Sheets-She'et 7 A l 623 226 Alm] 5 1927 H. A. BALLARD CHANNELING MACHINE Filed Aug.15. 192s 8 sheetssheet a Patented Apr. 5, 1927.

UNITED STATES' HARRE A. BALLARD, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY CORIPORATION, OFEATEREON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CHANNELING MACHINE.

Application fue@ August 15, 1923. semi No. 657,526.

upon its backward stroke, a presser footniovable with the knife for gaging the depth of the cut, a primary feed device for feedinnl the work against the knife while the ku. 'loving baclmiardly to cut the work,

and a secondary feed device for impartingan auxiliary feed movement tolthe work to advance the work with the knife during the fl'orward or non-cutting stroke of the knife.

@ne object of :the present invention is to provide `an improved and simplified channeling machine in which the workis fed wh'lc` the cutting Ameansis operating and an additional feed mrrvement is imparted `to the` work wl'iiletl-ie cutting means is inoperative to cnt the work. f

lilith this object in view, an in'iportant` feature ef this invention consists in the provision, in a machine of the class described, `of feeding means intermittently operative to feed the work, 'cutting means movable opposite to the direction of feed to cut the work while said lfeeding means is operative and movable to starting position while said feeding means is inoperative, and means constantly in engagement with the work for imimi-tiiig an additional feed movement to the work duringI the movement of the cutting meai'is to startii'ig position. More specifically, and as embodied in the illustrati-id machine, this feat-ure of the invention comprf" s .a lknife reciprocable in the line of feed of the work and` arranged to cut'npon `its backward fstro'km-a main or primary feeding means for feeding the work 'aga-inst the knife whilethe .platters is movingbackwardly 'to cut the work, `and a presser foot which 'unctions in a wellknown manne-r during the backward or cutting stroke 4ofthe knife to gage the depth of the cut, and which is constructed and arranged to .impart an auX- rhary feed movement to the work to advance 1the work with the knife during the forward or non-cutting stroke of the knife.k

ly thus utilizing the presser foot for feeding the work while the `primary feeding means is inoperative and fthe knife `is returning -to its stanti-ng position, the employment 'of additional mechanism for feeding the work lat this time is avoided and the coni struction of the machine is simplified to a material extent.

In the illustrated embodiment of the vin-l vention, ther-e is provided a channeling knife for cutting obliquely into the upper face of a sole tor form -a channel and an`in- Yner lip, an edge-slitting-knife for cutting iinwardly from the sole Ledge to form an outer .lip a-nd a feather, and also ya vertically clisposedknife associated with the edge-slitting knife for trimming 'the outer lip. Each of these knives is reciprocated in the line of feed and :arranged to cut upon its backward stroke. In order further to simplify the constructionv and mode of operation of 'the machine, provision is made for moving *all of these knives in unison, and a single feed device `is employed to effect the main or ,primary feed movement of the work, i. e., to .advance the work during the concurrent backward cutting strokes of the knives. The means which is preferably employed for this purpose `comprises ya single four-4 motion feed dog, the feeding stroke of which is timed to concur with the cutting strokes er1 the knives. Two presser feet are provided, one of which isassociated with the channeling knife and the other with the rige-slitting knife. These Ypresser feet are arranged 4to move forwardly'and backwardly and to yield vertically in unison with the knives. @n the backward or cuttingstrokes of the knives th'e presser feet slide freely over the surface of the work and .functiony in the well-known manner to gage the depth to which the knives penetratie` the work. The presser feet are so constructed that upon the forward or non-cutting strokes of the knives, andthe concurrent return or idle moven'ient of the feed dog, the presser feet bite into the work and feed the work along with the knives.` llvlhile it is preferred to employ two presser feet for feedingl the work yas above described, satisfactory results CFI can be obtained if only one presser foot is constructed and arranged to perform a feeding function and accordingly the invention is not limited to the use of a pair of presser feet for this purpose. Nor is the invention limited tothe use of a presser foot having the usual gaging function as the means for imparting the auxiliary feed movement to the work. In the illustrated machine, as in the machine of the hereinbefore mentioned co-pending application, the auxiliary feed movements are imparted to the work during the return or non-cutting strokes of the knives in order that the machineI shall be enabled, at each successive cutting operation, to make a cut the length of which is substantially equal to the distance travelled by the knife while it is cutting the work plus the distance through which the work is advanced at each feed stroke of the primary feeding means or feed dog. In the drawings, the mechanism for horizontally reciprocating the feed dog has been designed to move the latter through a feed stroke somewhat longer than the stroke of the knives and vpresser feet, and provision has been made for varying the relation between the path of the feed dog and the plane of the work table, so that the desired length of feed movement may be derived from the feed dog regardless of variations `in the thickness, density, or other characteristic of the work.

Another object of the invention is to insure the performance of superior channeling or cutting operations around the toe or other more or less sharply curved portion of the sole margin.

To this end, provision is made for varying the length of stroke of both the main and the auxiliary feed devices. Preferably the stroke of the cutting means will also he vzfiried at the same time. By thus varying i the length of stroke of the feed devices and of the cutting means, the sole is enabled to be swung' or mzznipuls'rted more readily to facilitate channeling around the toc. In the illustrated machine, the arrangement is such that the feed strokes and cuttingi strokes may be shortened simultaneously and proportionately at the will. of the operator upon the depression of a foot treadle or other control device and lcngthened automatically and colufurrently upon the release of the t-readle. Preferably also the strokes of both the main and the auviliary feed devices and the .strokes of the cutting means are derived from actuators each of which has a constant throw. and the means for shortening the feed strokes and the cutting` strokes accomplishes its purpose bv utilizing portions only of the throws of the actuators and is capable of nullifying the throws of the actuators entirely. Provision is also made in the illustrative machine whereby. when the throw of the actuator for t-he main feed detuator, thus further facilitating the swinging of the sole at the toe by causing the sole to be entirely clear of the main feed device so long as the latter has no work feeding iii we11ient- The invention further consists in the features of construction and in the combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be apparent to those skilled in the art.

rthe various features of the invention will be best umlerstood from a description of the preferred en'ibodiment thereof, illustrated in the accompanying drawings, in which l is a view, in front elevation, of the improved channeling machine;

Fig. 2 is a side elevational view thereof;

Fig. 3 is a detail view showing the knives and illustrating the manner inwhich they operate upon the work; y

Fie. 4 is a top plan view of the machine:

Fig, 5 is a. view, partially in plan and partially in section, 'of the front portion of the machine, various parts heilig broken away to reveal certain structural features of the machine;

Fig. 6 is a front elevational view, on an enlarged scale, of the greater portion of the machine, certain parts being removed or broken away and a portion of the supporting structure being shown in section;

Fig. 7 is a detail sectional view taken along the line 7 7 of Fig. G, and showing particularly the manner in which the channeling` knives are mounted;

Fig. 8 is a sectional view of the machine taken substantially along the line 8 8 of Fig. G:

Fig. 9 is a detail view, partially in sei-- tion on the line 9 9 of Fig. 8, showing particularly the mounting` of the edge-slitting and lip trinmiing knives and the associated presser' foot;

Fig. l0 is a sectional view of the macliine taken substantially along the line 10-l0 of Fig. 6;

Fig. ll is a view. in horizontal section. taken substantially along the line 11 ll of Fig. l;

Fig. 12 is a detail perspective view showing the edge-slitting knife, the lip trimming' knife and the presser foot associated therewith, together with tlie block upon which these parts are mounted;

Fig. 13 is a detail perspective view showing the channeling knife, the associated presser foot and the block upon which they are mounted;

Fig. 14 is a view, partially in plan and lUll lpartially in section on the line 14-14 of flfi'g. 27 lcertain `parte being broken away for purposes of illustration; and

Figs. l and 16 are ldetail sectional views taken ysubstant-ially along lthe lines ILS-15 and 16-46, respectively, of F 14.

Referring to the drawings, the machine therein shown comprises, in general, a frame or head 2O upon which the various operating' instrumentalities are mounted; -a freely rotatable work table or support 22 across which the work is fed while :being operated upon; an edge :gage 24 against wl'iich ythe work is held by the operator; a chamfer knife 26 which is immovable in the direction of work feed and which functions to bevel the lower corner of the sole edge; a channel.- ing' knife 28 for forming the inner lip; an edge-slitting knife for forming the outer lip and the feather; a lip trimming knife 82 associated with the edgeslitt-ing knife; presser feet 84 and 36 associated with the channeling knife and edge-slitting knife respectively; a horizontally reciprocating slide or carriage 88 upon which is mounted the channeling. edge-slitting and lip trimmingv knives, and the presser feet; a four-motion feed dos); 40; a second horiZontally-recipro-y eating slide or carriage 42 which carries the feed dog; a main shaft 44: mechanism including' two eccentrics 46 and 48 on the main shaft for operating' the slides 38 and 42 simultaneously in opposite directions; and means including a third eccentric on the main shaft for moving the feed dog vertically into and out of feeding engagement with the work. For convenience of description the expression channeling knives7 will, be adopted hereinafter to designate collectively the channeling knife 28 and the edite-slittiufe` knife 80.

rl`he frame or head 20 ofthe machine is supported at a convenient height for the operator bv means of a suitable standard having; a flanged upper end 56 which is bolted, or otherwise rigidly secured. to the lower portion of the head. The main shaft 44. which carries the eccentrics for onoratinpj the reciprocating channeling; `knives and the feed dog'. extends horizontally'from the frontto the rear of the machine and is journaled in bearings 58 in the upper portion of the head 20, said bearings being provided with suitable bushings 60. At its rear extremity, the shaft 44 is provided with a driving pulley 62 which may be connected with a suitable-source of power. The channeling' knife 28, the edgeelitting; knife 3() and the lip trimming knife 32 are reciprocated in unison in the line of feed of the work by means of the slide 38 on which they are mounted and these knives yare arranged to cut the work upon their backward strokes. The sli-de 38 which carries the above-nientioned parts and the slide 42 which carries lthe feed dog 40 are located side by side in a portion of the head lI2() which oveiehangs the v feed table 22 and these .slides are operated yby the re'ccentr-ics 46 and 48, respectively7 as hrereinbefore stated. The eccentrics v46 and 48 are disposed with their :centers located at diametrically opposite points to canse the slides 38 and 42 to move simultaneously in opposite ldirections so that the channeling knives will loe moved opposite to the direc- `tion of feed to fcut the work while the work is being fed forwardly against the knives by the feed dog.

`While being); operated upon, the work rests upon the work table 22. The work table 22 is circular in plan View and .its periiiliery vclosely surrounded by a wall 64 (Figs. 81and `this purpose upon :a stationary horizontal work-table support 68 (Figs. land 2) which projects forwardly from the base of the head 20. The work-table support 68 extends between lflanges 70 which depend from oppo-- site sides ofthe slide 66 andare arranged to bear against the corresponding sides of the work-table support to prevent lateral displacement of the slide.

To lessen frictional resistance to the feeding of the work. the work table .22 is mounted to turn freely within the enclosing` wall 64. To this end the work table is axially bored to provide a bearing; socket72 (Fig-8) for a post 74 which rises from the base of the work-table slide 66 in co-aXia-l relation to the inside of the wall 64. The work table `rests upon an anti-friction bearing' which may comprise hardened steel rings or 7ashers 76and 78, and a series of balls 80 that are confined in a caire `82 and are interposed 'between the rings 7 6 and 7 8. The side of the work table 22 is peripherally cut away or recessed, as shownat 84 in Fig. 8, to reduce its area of bearing surface in engagement with the wall v64. By' thus recessing the table 22,-bearing shoulders 86 and 88 are formed which engage the inner side of the wall 64 and serve, in conjunction with the post 'l' 4 and the bearing); socket 72, to h old the table against lateral vibration. The upper side wall of the peripheral recess 84 in the work table is beveled. as shown at 90, to reduce to a minimum the area of the bearing) shoulder at thetop of the table and further to provide clearance for the chamfer knife, 26. as will hereinafter appear. The antifriction bearingl supports the weight of the work table and receives the end thrust thereof while the work is being operated upon.

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The edge gage 24 is rigidly secured to the rear of the cylindrical wall 64 by means such as the bolt 92 (Fig. 8) and projects above the plane of the work table to engage the edge of the sole so as to determine the location of the channel cuts relatively to the sole edge, and thus to determine the width of the feather. In order that the width of leather may be varied upon different .soles or upon different portions ot the margin ot a. sole, provision is made for varying the location of the edge gage relatively to thc channeling knives and transversely of the line ot feed. This is accomplished by adjustingl the work-table slide 66 horizontally upon the slide support 68.

rlhc means `for adjusting` the work-table slide 66, to obtain the desired relative location of the channeling knives and the edge gage, comprises a bell-crank lever 98, best shown in Fig. 14. The bell-crank lever 98 is pivoted for horizontal mov-ement upon abolt 100 and is provided with a relatively short cam arm 102 and a relatively long operating arm 104. The pivot bolt 100 is secured to a segmental plate 106 which is rigidly secured, by means of screws 108, to the base of the head 20. The outer eXtremity of the long lever arm 104 is shaped to provide an operating handle 110. and the segmental plate 106 and the handle'110 are provided with interengaging locking devices for maintaining the bell crank lever 98 in locked position at several points of its swinging movement so as to provide for a corresponding number of predetermined adjustments of the worktable, and consequently of the edge gage, relatively tol the channeling knives, as will be explained more fully hereinafter. The cam arm 102 ot the bell-crank lever .98 is formed with a cam slot 112 (Figs. 2 and 1,4) adapted to receive a cam roll 114 carried by a stud 116 which depends from a rearward extension 118 ot the woik-table slide 66 and projects through a slot 120 in the slide support 68.

rlhe hereinbefore mentioned interengaging devices for securing the bell-crank lever 98 in locked position at several points of its swinging movement comprise a latch which is carried by the lever 110 and is indicated by the general reference numeral 122, and a series ot notches 124. 126 and 128 which are formed in or by means of adj ustable parts associated with the segmental plate 106 in a manner to be hereinafter described.

The latch 122 comprises two levers 130 and 132 (Figs. 1 and 16) which are pivoted together intermediate their ends by means ot a pin 184. One end of the lever is pivoted at 136 to the handle 110 of the bell-l crank lever 98' and the corresponding end of the latch lever 132 is shaped to enter the several notches 124, 126 and 128. The

opposite ends ot the latch levers 180 and 132 are shaped to form handles 138 and 140, respectively, to be manipulated by the fingers ot the hand which grasps the handle 110 of the lever for adjusting the work table. Ears 142 depending from the handle 110, at opposite sides of the lever 130, serve to guide the latter and to reinforce it against the thrust ot the work when the l-ever 98 is locked in one of' its several adjusted positions. The latch levers 130 and 132 are normally maintained in the relativo positions in which they appear in Fig. 16 by means ol a spring 144 which is interposed between the handles 138 and 140 and holds the inner arm of the lever 1252 against a portion ol the lever 180. The holding engagement oit the latch 122 with one or another of the notches 124, 126 and 128 is maintained by means ot a spring 146 which is interposed between the handle 110 and the lever 130. The relation of the pivots 134 and 136 to the segmental plate 106 is such that the handle 138 may be lifted to disengage the latch from the co-oj'ierating notch in the segmental plate, and the relation further is such that the handle 140 may be manipulated to depress the opposite end otl the latch lever 132 below the plane of the segmental plate 106 l'or a purpose to be hereinafter described.

Provision is made whereby the positions ot the several notches engaged by the latch 122 may be shifted relatively to the pivot 100 ot' the bellcranlz lever 98 to provide for various predetermined relative adjustments ot the edge gage and channeling knives. To this end, as best shown in Figs. 14 and 16, the central notch 124 is formed in a torwardly projecting portion of a segmental slide 152 that is adjustably secured to the front of the segmental plate 106. The segmental portion of the slide 152 is located in a segmental guideway 154 in the plate 106, the guideway beingv formed between a shoulder 105 and two lugs 155, 155 which project upwardly from the plate 106 at op posite sides of the portion 150 ot the slidel 152. The slide 152 is adapted to be adjusted. longitudinally in its guideway 154 to vary the radial location ot the central notch 124. and thus to vary the relative adjustnient or the edge and the channeling knives when the latch 122 is engaged in said central notch. A clamping screw which is threaded into the plate 106 is provided with a head which overlaps a portion of the seg;- mental slide 152 and which serves to lock this slide in adjusted position when the screw is tightened. The notches 126 and 128 are formed between shoulders on the rorwardly projecting portion of the slide 152 and the adjacent opposed ends oit two blocks 156 and 158. The blocks 156 and 158 are adjustably secured to the peripheral face of the segmental plate 106 by means of screws 162 the shanks of which extend through longitudinal slots 164 in the blocks. The slots 1.64 permit adjustment of the block-s toward and from the adjacent shoulders on the slide 152. lVhen the location of the central notch `124 is changed, the blocks 156 and 158 may be adjusted to widen one of the notches 126 and 128 to enable it to receive the co-operating portion of the latch 122, and to shorten the :other of said notches to prevent play between the latch and the sides of the notch. Thus the radial positions of the three notches 124, 126 and 128 with respect to the pivotal axis of the bell-crank lever 98 may be varied at will bythe operator. grasping the handles and 188 and moving them toward one another, the latch 122 will be lifted from the notch which it engaged and the lever 98 may then be moved freely in one direction or the other to adjust .the slide 66 and the work table. Obviously this adjustment may be made while the machine is running if it is desired to change the width of the feather at different parts of the sole margin. By lifting the handle the lower latch lever 132 may be swung below lthe plane of the segmental slide 152, thus leaving the slide 66 free to be moved forwardly to permit the convenient removal and replacement of the chamiler knife slide, as will hereinafter be explained.

rlhe chamfer knife 26 is provided for the purpose of cliamfering or beveling the sole edge adjacent to the lower or unchanneled face of the sole for a purpose well know-n in the art. The chamfer knife is located at the side of the edge gage which is foremost in the line of feed of the work; The shank portion of the chamfer knife, as best shown in 2, 8, 10; 14 and 15, is fitted wit-hin a notch 1,68 in a supporting slide and is rigidly secured to the slide by means of a screw 172. The .cutting edge of the chamfer knife Iprojects upwardly above the upper surface of the work table at an angle of approximately forty-live degrees. A rib 174 on the shank of the chamfer knife is received in a corresponding horizontal groove in the chamfer knife slide 1,70 and assists in accurately locating the knife relatively to the slide and in preventing displacement of the knife.

While a sole is being fed through the machine by means of feed mechanism hereinafter to be described, the sole is swung about the edge ga ge 24 so that the proper relationship will beY retained between the sole edge and the channelingknives `as the points of operation ,of the knives are transferred around the sole. The chamfer knife is located at one side of the edge gage and accordingly it is obvious that as the sole is swung about the edge gage, the portion of the sole edge which is opposite the chamfer knife will be moved more or less relatively to the edge gage in a direction transverse to the direction of feed. To assure that the chamfer knife shall continuously be maintained in predetermined operative relation to the sole edge as the sole is swung about the edge gage, the slide 170, which carries the chamfer knife at its forward end, is. movable horizontally at right angles to the direction lof feed and is yieldingly pressed toward the sole edge. The chamfer knife slide 170'is further provided with a follower or knife gage 176 which extends transversely across the cutting edge of the chamfer knife within the plane occupied by the sole, when the latter is upon the work table.

The follower or chamfer knife gage 176 is formed with a depending shank portion 178 which is secured to the chamfer knife slide 170. While a sole is being operated upon, the follower or gage 176 is continuously held :against the sole edge by means of yielding pressure against the yslide 170 and thus said gage functions to determine the location of the chamfer knife relatively to the sole edge. The gage176 is so located relatively to the chamfer knife, in the direction `of movement ofthe slide 170, that the knife is continuously maintained in proper cutting relation to the sole edge irrespective of the turning movements of the sole about the edge gage. The wall 64 which encloses the work table is provided at the rear of the work table with a notch'180 (Figs. 8 and 14) into which the chamfer knife andthe knife gage or follower 176 project, the notch permitting the knife ,and knife gage tojbe normally vlocated somewhat nearer the front of the machine than the edge gage, to insure that said knife and knife gage will be en.- gaged by the work `as thela'tter is properly positioned `relatively to the channel knives and edge The chamfer knife slide 1i() is mounted in a horizontally disposed dove-tailed guideway 182 formed in a bracket 184 that is rig-` idly secured to the stationary work-table support 68. The slide 170 is provided with ribs 186 (Fig. 10) which extend horizontally along the upper and lower edges of ythe slide. The ribs 186 `are received in the undercut or grooved portions of .the dovetailed guideway 182. The ribs are notched or cut away at 188 and the undercut portions of the guide-way are notched at 190 see `10) to facilitate the removal ofthe slide from the guideway, as will hereinafter be explained. At its rear extremity, `the chamfer knife slide is provided with a proj.

jecting s top lug 192 (Figs. 2 and 14) which extends beyond the bracket 184 and is adapted to co-operate with the rear extremity of the latter to limit the forward movement of the chamfer knife slide 170 The `los lslide 170 is yieldingly pressed toward the feed table 22 by means of a spring 194 which is secured at one end to the lug 192 and at the opposite end to the pin 196 on the bracket 184.

The follower or knife gage 176 is offs-et laterally from its depending shank portion 178 and the forward portion of the gage is rounded, as indicated at 198, to provide a smooth surface to meet the oncoming work. rlhe offset portion of the follower' 176 is undercut at an angle suitable to receive the blade of the chamfer knife. rllhe follower or gage 176 is carried by a block 200 (Figs. 8 and 15) which is removably secured to the slide 17 O by means of a screw 202. A rib 204 on the block 200 engages a corresponding groove in the slide 17 0 to prevent the block from turning about the screw 202. In order that the cutting edge of the chamfer knife may be readily expose-d for sharpening without th-e necessity of removing the knife from the slide 170, the shank of the eliamfer knife follower 176 is hinged at 206 to the block 200 and is normally maintained in vertical or operative position by means of a finger 208 pivoted at 210 to the shank of the follower and arranged to overlie the block 200 so as to prevent the follower from being swung away from the chamfer knife.

To facilitate sharpening of the ehamfer knife, the slide upon which it is mounted is adapted to be removed from its guideway in the bracket 184. To this end, the step lug 192 is pivotally connected to the slide 17() in the following manner:-A laterally offset ear 212 (Fig. 14) is received in a. notch 214 at the rear of the slide 170 and is pivoted on a vertical pintle 216 carried by the slide. The tension of the spring 194 will hold the stop lug 192 in the position shown in Fig. 14 so that the lug will perform its function of limiting the forward movement of the slide. By detaching the spring 194 from the stop lug 192, the latter may be swung bodily backward about the pintle 216 until it is clear of the bracket 184. Before the slide 170 can be withdrawn from the guideway 182, it is necessary that the work table 22 shall be disconnected from the bell-crank lever 98. This is accomplished by manipulating the latch 122 and swinging the handle 11() to its rearmost position, thereby disengaging the roll 114 from the cam slot 112 in the bell-crank lever. This permits the chamfer knife slide 17() to be moved forwardly until the greater portion of the slide is clear of th-e guideway 182 and the portions of the ribs 186 which are at the rear of the notches 188 are brought into registry with the notches 190 in the undercut portion of the guideway 182. The slide 170 may then be easily removed from the guideway 182 by a lateral movement of the slide.

A. treadle connection may be provided for neaaaae withdrawingv the chan'ifer knife from the path of the work, either for the purpose of 'facilitating the introduction of the work into the machine, or to prevent the chamfer knife from operating upon the work. For this purpose, the free extremity of the stop lug 192 is extended beyond the bracket 184 and an arm 218 (Figs. 2, 8 and 10) is pivoted at 229 to the bracket 184 for vertical swinging movement in. the plane of the projecting end of the stop lug 192. At its upper end the arm 218 is connected by means of a link 222 to one arm of a bellcrank lever 224 which is pivoted at 226 to the frame of the machine. The other arm of the bell-crank lever 224 may be connected, by means of a rod 227.l with a suitable foot treadie (not shown). A spring 288, one end of which is secured to the arm 218 and the other end to a pin projectingT from. the bracket 184, normally holds the arm 218 against a stop 229 on the bracket 184.

The channeling knife 28 and the edgeslitting knife 8O are rigidly but adjustably secured to knife carriers 230 and 232, respectively, by means hereinafter to be described in detail. The two knife carriers 230 and 232 consist of elongated bars which are rectangular in cross-section and are made hollow, as shown clearly in Fig. 11, to reduce their weight. The knife carriers A3() and 232 are arranged side by side in slidingl contact and are mounted for movement toward and from the work table in a vertical guideway 234 formed in one face of the horizontally movable knife carrier slide 38. rllhe opposite ends of the knife slide 38 are notched as indicated at 236 to receive supporting blocks 238 (Fig. 6) which are rigidly secured to the frame 2O and have paraliel bearing faces for engaging the upper and lower sides of the notches 236 and thus guiding the slide 38 for horizontal reciprocation.

The knife carrier 230 is mounted for vertical movement in the guideway 234 in face to-face sliding contact with the knife carrier 232. A screw 240, which is threaded in the upper end of the carrier 230, extends freely through an aperture in a stop plate 242 carried by the knife carrier slide 3a and the head of the screw 240 overlies the stop plate 242 to limit the downward n'ioveinentof the knife carrier and the parts carried thereby. r1`he knife carrier 239 is allowed a yielding upward movement in the guideway 234byn1eans of a grasshopper77 spring 244 which is coiled around a stud 246 carried by an extension 248 of the stop plate 242, one leg of the spring bearing downwardly against the head of the screw 240 and the other leg of the spring bearing against the head of a screw 26() in the stop plate extension 248. The head of the screw 250 is radially notched to receive the adjacent leg` of the spring which serves to lock the screw in adjusted position. As shown, the head of the screw 2li() is also radially notched to, receive the other legI of the spring 2441, thus holding the latter in xed relation to the screw and also locking the screw against turning. By lifting' the spring from the notched head of the screw 2410, said screw may be turned to adjust the channelinit;` knife vertically with ren spect to the work table. By releasing the spring 244C from the screw 250, the latter screw may be turned to vary the tension of the spring; 24:4.

The knife carrier 282 is substantially similar in construction to the knife carrier 280, just described, and it` is mounted in the `ajuideway 284i and is springepressed downwardly in the saine manner as the slide 280, by means of a spring and, associated parts designated by reference numerals similar to those applied to correspionding ,parts are sociated with the carrier 280.

In order to provide for accuracy and uniformity in the channeling` operations upon difformitsoles, it is desirable to provi/lo .means for insuring against play or lateral displacement of the knife carriers in the lguideway 284. To this end, the knife earriers 280 and 282 are provided with vertical tongues 252 and 254, respectively, (Figs. 10 and 11). Each of the tongues 252 and 254: cut away intermediate its ends, as indicated at 256 in Fin; 10, to receive the free extremity of a lifting' lever 258 which is piroted at 260 to the frame 20. At the end remote from the knife slides the lever 2158 is connected, by means hereinafter to be eX- plained, with a foot treaclle, not shown. The tongues 252 and 254 are received in a vertical tojroove 264': in the knife carrier slide 88 and the tongues 252 and 2541 and the groove 2G47 are carefully machined so that the tongues have close slidingr fit in the groove. This interengagement of the tongues and the `groove reinforces the knife carriers against the thrust of the channeh ine` knives and prevents lateral'displacement of the knife carriers such as might be permitted by reason of play resulting' from wear between the knife carrier 280 and the adjacent slide 4t2 which carries the feed dogg. By reason of the interfittinp; of the tongues and 254i in the groove 284-. the knife carriers 280 and 282 can beinaintained in parallel vertical relation at all times so that the relative positions of the channeling knife and the edgesliittingr knife are invariable and uniformity of operation upon different soles is insured.

The channeling' knife 28, which is attached to the carrier 282, is formed with a horizontal cutting edge 268 (Figs. 8, 7. 8 and 18) and a` vertical cutting edge 270 which (3o-operate to cut a. channel in 'the wor-k. as indicated at 272 in Fig. 8. 'thereby forming an inner lip 274i, The cutting edges 268 and 270 are formed on a shank 276 (Fig. 18) which is disposed at an angle to the knife carrier 280. To support the channel-l ing knife 28, the knife carrier 280 has a laterally extending foot 278 (Figs. 8 and 10) to which a knife block 280 is secured. The knife block 280 is secured to the foot 27 8 by means of a bolt 282 and nut 2811-, the bolt 282 extending through a horizontal slot 288 in said foot. The slot 286 permits adjustment of the knife block 280 horizontally relatively to the knife carrier 280. To inaintain the knife block 280 in fixed relation to the carrier 280, a rib 288 on the knife block interlocks with the slot 288 in the carrier foot 278. The bolt 282 is provided with a head 290 which is groored to receive horizontal ribs 292 on the. foot 278 of the knife carrier 280 so that the bolt head`290 is prevented from turning. An adjusting` screw 2941 is threaded horizontally through the bolt head 290 and is arranged with its inner rend bearing; against the face of the knife carrier 280. rThe screw 294 may be turned to adjust the` bolt 282 outwardly in the slot 286 for the purpose of adjustingv the knife block 280 relatively to the foot of the knife. carrier, and thereby adjusting; the channelinfr knife 28 away from the edge-slitting knife 80. The shank of the channelingkiv fe 28 is received in a `groove 296 in the knife block 280 and is held therein by means of a cap plate 298 which is clamped against the knife shank by means of bolts 800. An abutnientscrew 802 is threaded through a por-- tion of the knife block 280 at an angle to the shank of the channeling knife, as shown in Figs. 7, 1`0and 18, and it is provided with a conical inner end for engaging the upper extremity of `the knife shank in such a way that the screw 802 may be turned to adjust the position of the knife shank in the groove 296 and thereby to vary the elevation of the edgeof the channeling' knife relatively to the associated presser foot 84.

The* edge slitting knife 80, which is attached tothe knife carrier 282, is formed with a horizontal cuttingr edge 806 (Fig. 12) to cut a. slit 808 (Fig. 8) inwardly from the sole edge so as to forni an outer lip 810 and a feather 812. In certain classes of work it is desirable to increase the width of the feather along certain portions of the sole margin, especially at the shank of the sole. It is desirable, however, to prevent increasing correspondingly the width of the outer lip at such portions of the sole and lthus to insure that when the lip has been turned up, it Will not be 'higher than along the remaining portions of its length. Accordingly, there may be associated with the edge-slitting knife 80, a lip trimming knife such as shown at 82. the knife 82 having` a vertical cutting,r edge for trimming' off the surplus portion of the outer lip where the lip is of iso inaxin'ium width.. The action of the lip knife 32 is illustrated in Fig. 3, wherein the surplus portion of the outer lip which has been trimmed by the knife is shown at 314. The lower edge of the lip trimming knife 32 is inclined lto conform to the transverse bevel of the edge-slittingv knife, thus enabling the vertical cutting edge of the lip trimming knife to abut the horizontal cutting edge of the slitting knife.

Vlhe edge-slitting knife 30 and the lip trimming knife 32 are both supported upon a knife block 316 which in turn is secured to a laterally extending foot 318 at the lower end of the knife carrier 232. A bolt 320 and nut 322 secure the knife block 316 to the foot of the knife carrier 232, the bolt 320 extending through a horizontal slot 324 in the carrier foot to permit horizontal adjustment of the knife block relatively to the knife carrier. A rib 326 on the knife block 316 .interlocks with the slot 324 to maintain the knife block in fixed relation to the carrier. Horizontal ribs 328 on the foot of the knife carrier 232 are received in a groove in the head of the bolt 320 to prevent the bolt head from turning, and an adjusting screw 330, which is threaded through the bolt head, bears at its inner end against the knife carrier 232 so that by turning said screw the knife block 316 may be adjusted to move the edge-slitting knife and the lip trimming knife away from the channeling knife 28.

The edge-slitting knife is provided with a shank portion 332 which is clamped between the lower portion of the knife block 316 and a clamp plate 334 (Figs' and 12) by means of bolts 336 which extend through the knife block and are threaded into said clamp plate. The opposite longitudinal edges of the knife shank 332 are beveled and are received in `grooves in the knife block 316 and clamp plate 334. A screw 338, which is threaded through the clamp plate 334, bears at its inner end against the knife block 316 and serves to increase the clamping action of the plate and to lock the clampine` screws 336. An abutment screw 340. which is threaded through an ear 342 (Fig. 7) on the block 316, provides means whereby the knife 30 mav be adjusted when the screws 336 and 338 have been loosened.

The lip trimming knife 32 is provided with a shank of reduced width which is clamped between the knife block 316 and a clamping; plate 344. The opposite longitudinal edges of the shank of the lip knife are beveled and are received in dove-tailed I grooves in the knife block and in the clampaperture in the block 316 and is threaded within the clan'iping plate 344 at a point between the rib 346 andthe knife 32 and serves to bind the clamping pla-te against the shank of the knife. To remove or adjust the knife 32 it is necessary only to loosen the clan'iping screw 348. By independently mounting the edge-slitting knife 30 and the lip trin'imingl knife 32, as above described, these knives may be separately removed for the purpose of grinding and they may be adjusted relatively to each other to take up for wear.

The presser feet 34 and 36 are associated with the knives 28 and 30 respectively, and 1"? each presser foot is arranged to rest upon the surface of the work in proximity to the associated knife to hold the work down upon the work table as the knife is cutting and to limit the depth of the cut made by the knife. In addition, and in accordance with an important feature of the present invention, the presser feet function during the forward or idle strokes of the channeling knives to impart auxiliary feed movements to the work whereby the work is caused to advance with the knives so that the knives will be enabled to cuiJ the work immediately at the beginning of each backward stroke. As shown, each presser foot consists of a rectangular bar which is vertically disposed and is formed with a rounded lower edge at the side remote from the knives, thus enabling the foot to slide freely over the work during the backward or cuttingstrokes of the knives.

As best shown in Figs. 8, 9 and 12, the upper portion of the presser foot 36 is received in a socket in the knife block 316 and is secured in the socket by means of a screw 350 which extends loosely through a vertical slot 352 in the block 316 and is threaded into the shank of the presser foot. The head of the screw 350 bears against the outside of the block 316 so that when the M screw is tightened, the presser foot is securely clamped in place. The slot 352 permits the presser foot to be raised or lowered to adjust it relatively to the cutting edge of the knife 30. A minute adjustment of the foot 36 may be obtained by means of an adjustingscrew 354 which is threaded through the knife block 316, the inner end of said screw having a conical tip which bears against the side of an aperture 356 in the shank of the presser foot. -The upper or shank portion of the other presser foot 34 is received in a socket in the knife block A280 and is adjustably secured therein by means which is substantially identical with the means just described for securing the presser foot 36 to the knife block 316.

As the presser feet are moved with the channeling knives during the backward or cutting strokes yof the latter, they function in the well-known manner to gage the distance to which the knives penetrate the work and thus to determine the depth of the cuts made thereby. During the forward or non-cutting strokes of the knives and concurrent idle backward movements of the feed dog', the presser feet function to feed the work along with the knives as above described. To enable the presser feet to perform this feeding function, the bottom faces of the feet are shaped, as best shown in Fig. l2, to provide a sharp edge or corner at the forward side of eachl presser foot, this edge being adapted to bite into the work to a certain extent as the presser foot moves in the direction of feed. The shape of the bottom of the presser foot is such, however, that while its forward edge bites into the work sufficiently to feed the work positively, the surface work is not roughened or injured thereby. The presser foot 36 is arranged with the forward or work engaging edge of its bottom face substantially inor slightly to the rear of the vertical plane of the cutting edge of the knife 30.

As the knife is moved backwardly to cut the sole and form a lip thereon, the portion of the sole stock which overliesthe knifeis displaced slightly above the upper face of the solo by the thickness of the knife. 'With the above-described relative arrangement of the presser foot 36 and knife 30, the portion of the sole stock which is upwardly Vdisplaced by said knife is located directly Iahead of the presser foot. By rea-son of this upward displacement of the sole stock by the knife 30, it will readily be appreciated that the presser foot 36 will be enabled, upon itsforward,v stroke, to bite into the sole in such a manner as to insure a positive feed of the sole by the presser foot. It will be seen, therefore, that 'the presser foot 36 and the knife 30 yactually co-operate toY efl'ect the feed of the work. vIt is to be understood, however, that such rco-opeiation of the presser foot and the knife is not regarded as an essential feature of the invention inasmuch as it has been found to be practicable to feed the work in a. reliable manner by means of the presser foot alone. It has also been found that a satisfactory and positive feed of the work may be obtained without arH ranging both presser feet directly behind the respective channeling` knives, and it will be observed that the presser foot 34 has not been arranged directly behind the channeling knife 28 although it may be so arranged without departingJ from the'spirit of the in vention.

In order that the chimneling knives and ythe presser feet may be reciprocated hori- Irointially inI unison to cut and feed the work, the slide 38, in which the knife carriers 230 and 232 are mounted, is reciprocated by ag:- tuating mechanism deriying its motion from the eccentric 46 on the main shaft 44. To this end, the slide 38 is connected by a link 360 with the depending arm 362 of a lever which is also provided with a shorter upwardly extending arm 364. As best show-n in Figs. 4 and 5, this two-armed lever is provided with a duplex hub 366 which is mounted' to rock upon a fixed shaft 370 that is supported in ears 372 extending from the frame 20. The lever arm 364 extends upwardly from the hub 366 nand is pivoted to an cecentrie rod 374 having an eccentric strap 376 which encircle-s the eccentric 46.

It is desirable that means be provided hfor varying the rate of feed of the work while the machine is in operation and especially for slowing down the work feed while the relatively short curve at the toe of the sole is being cut. To this end, the depending lever arm 362 is provided with an elongated arcuate slot 373m which a block ,38,0 is adapted for sliding adjustment, the link 360"being bifurcated tostraid'dle the lever arm 362, 'and the block 380 carrying a stud 382 which is journaled 'in the bifurcated end of the link. The link 360 may be swung upwardly about its pivotal connection with the slide 38 to shift the block 380 in the -slot so asteY move the blocktoward orfrom the axis, of oscillation 4of the two-armed lever and thus to vary lthe extent of reciprocation of theslide 38 and Consequently ofthe knives and' the presser feet. yTo this end lthe I link y360 is connected to one end of a curvedarm I384 (Fig.y l) the opposite end of which is Vmounted to rock upon a fixed stud 3.86.. The

connection between the link 360 and the arm l384 comprises a pin 388, one end ofwhich 4is fast inthe curved arm 384and" the opposite end of which is received in a longitudinally elongated slotv390 in the link 360. The pin 388, is connected by means of' a short link 392 with an arin 394 that is fixed uponr the forward end of a horizontal rock-shaft 396.

`The rock-shaft `396 is arranged parallelto the main shaft 44 and is mountedi'to turn in bearings 398 (Fig. 4) lon the frame20',- t

its rear extremity the rock-shaft 396 is prov videdI with an arm 400 which may be connected by a chain 402 with a fo'ot-treadle t not shown). A spring 404, ,which is coiled about the rock-shaft 396, tends to rotate said shaft in a direction to'hold the treadle in elevated position anelito maintainthe block 3804 at the lower end of the slot in the lever arm 362, so that, under normalfoperating conditions, a stroke ofl maximum ylength will be imparted to ,the knife slide 38. Upon ,depression of the trealdle connected with the arm 400, the block 380 may be moved ,upwardly in the slot 378 to shorten the Alength of stroke of the knife carri-er slide 3(8,and upon the release of said treadle the Iblock ,380` willbe immediately returned by the action ofthespring- 404' to the lower endfof the slot 378, thus automatically restoring the slide-actuating mechanism into condition to reciprocate the slide 38 through strokes of normal maximum length.

To enable the work to be introduced between the presser feet and the work table in position to be operated upon, means is provided for lifting the knives and presser feet bodily with relation to the work table. This means comprises the lever 258 hereinbefore mentioned, and in order that this lever may be conveniently actuated by the operator, its rear extremity may be connected with the bell-crank lever 224 by means of a link 406 such as shown in Fig. 2. By means of this arrangement the lever 258 will be actuated in unison with the bellcrank lever 224 upon depression of the treadle connected with the last-named lever, and as a result both channeling knives will be lifted and th-e chamfer knife will be withdrawn simultaneously from their operative positions; If desired, the lever 258 may be connected with a foot treadle independently of the chamfer knife. As best shown in Fig. 10, the forward end of the lifting lever 258 extends through a slot 408 in the frame 20 and through a slot 41() in the rear of the knife carrier slide 88 and said lever projects into the notch 256 which is formed between the upper and lower sections of the tongues 252 and 254 on the knife carriers 280 and 282. The notch 256 is wider than the cooperating end of the lever 258, thus permitting the knife carriers 230 and 232 to move vertically to accommodate themselves to different thicknesses of work without being interfered with by said lever. The depth of the notch 256 is also greater than the thickness of t-he lever 258, as shown clearly in Fig. 11, thus permitting the knife carrier slide 38 to reciprocate horizontally relatively to said lever. It will be desirable to lift the knives and the presser feet in the manner above described if the channeling operation is to begin at any point intern'iediatethe ends of the sole as, for example, at the rear of the shank portion. The channeling knives and the presser feet may be lifted in a similar manner for the purpose of withdrawing the knives from the sole when the cutting has progressed to a corresponding portion of the sole marin at the opposite side of the sole from the point of beginning.

The feed dog 40, as best shown in Figs. 6, 8 and 10, is bifurcated at its lower extremity to provide two feed points or teeth 412 which are inclined forwardly in the direction of feed. One tooth 412 is offset laterally from the other and the teeth may be so arranged relatively to the edge gage that they will dig into the sole at opposite sides of the between-substance and thereby avoid injuring or weakening the latter. The teeth of the feed dog are formed at the lower end of an inclined shank and the latter is secured by means of a screw 414 to a carrier which is indicated by the general reference numeral 416 and is movable in a vertical guideway 418 in the horizontally reciprocating slide 42.

The feed dog 4() is so mounted and actuated that when no work is present in the machine the feed dog moves through an orbital path of substantially elliptical shape the longest diameter of which extends substantially horizontally or in the direction of work feed. To produce this movementof the feed dog, the feed dog carrier 416 is reciprocated vertically by the eccentric 5() while the carrier slide 42 is reciprocated horizontally by the eccentric 48. Thus the component of the orbital movement of the feed dog in the direction of work feed is derived from the horizontally reciprocating slide 42 while the component of movement of the feed dog in a direction at right angles to the direction of work feed is derived from the vertically reciprocating carrier 416. As shown, the carrier slide 42 is located in front of the knife carrier slide 38 and is reciprocated horizontally in sliding engagement with the slide 38. The opposite ends of the slide 42 are provided with notches corresponding to the notches 286 in the slide 38, and the bearing blocks 238 extend through the notches in the feed dog carrier slide to support the latter. At their front sides the blocks 238 are provided with upwardly and downwardly projecting flanges 239 which overlie the front side of the slide 42 to prevent forward displacement of the slides 38 and 42. Rearward displacement of the slides 38 and 42 is prevented by the portions of the head 2O to which the blocks are secured.

The feed dog carrier 416 is made in two sections 420 and 422 which are positioned end tn end in the guideway 418 and arc loiwitudinall i recessed to receive between le .l them a coiled spring 424 which tends to hold them apart. To support the lower section 422 of the feed dogcarrier, a bolt 426 is provided, the lower portion of which-is threaded into the lower carrier section 422. The bolt 426 extends upwardly within the convolu- "i tions of the spring 424 and through an aperture in the top of the upper carrier section 420. At its upper extremity the bolt 426 is provided with a head 428 which normally engages the top of the upper carrier section 420 to limit the expansion of the spring 424 and to provide means whereby the upward movement of the upper carrier section 420 .may be communicated to lthe lower carrier section 422. The bolt 426 may be turned, by means of its head 428, to vary the upper limit of movement of the feed dog and normal extent of separation of the upper and lower sections of the feed dogl carrier. This adjustment is effective to vary the vertical lille) relationbetween- Athe path of movement of the feed, dog and theV yplane* of the "work table .for `a purpose hereinafterexplained.v

A set screw 430 in the lower carrie'rfsection' 422 engages an unthreaded extension 432 of the bolt 426 and locks the' boltfin adjusted' position. 'The upper -sectidn 42() of the feed dog carrier is supported byl means of an eccentric rod 434 which is vpivoted to the sect-ioii 420 at 435 (see'FigG). At its upper extremity the ecceiitiicrod 434 carries an 'cccentricstrap 436 which encircles'the eccentri`c5() at the frontend of ythe'main shaft 44. disk or cap 438, whichyis securedto theeccentric 50 by a screw 440, preventsforwarddisplacement ofthe 'eccentric strap, while rearward displacement of said strap is prevented by the front bearing y58 in wliichthe main shaft iej'ournaled. Byinea'ns of theV above described two-part Construction ofthe feed dogl carrier, the feeddog'i-s adapted'yieldingly-to engage t-lie work and is enabled to be actuated through an orbital path for "feeding the" work as pzeviously7 stated.

To prevent lateral displacement of the sections of the feed `dog carrier, such asv might be permitted by reason of play resulting from the Wear between the"- adjacent knife carrier slide 38 and the feed dog carrier slide `42, and tofinsure that the'feed dog carrier sections will be accurately guided in their vertical movements, each vof said'sections is provided with la tongue 442 (see Fig. 1l)- which` is closely interfitted within a vertical groove-444m the slide 42.' These tongues 442 increase the extent'of bearing surface between the feed dog carrier sections and' the adjacent guidingfwalls of the slide 42 and help to eliminate `undue'frictional Contact of said carrier sections With the' slide 42.

In order 'to l limit 'the downward movement of the. feed dog 40, under the pressure of the spring 424, so as to predetermine the lift thevlfeed dog` or to prevent the feed dog from "engaging the work, asl will hereinafter be explained. The horizontal lower portion 448of the-stopmember 446 has a' rearwardly projecting lug-454 (Fig. S) which extends *through-an aperture 456'L in theslide l'42 and is received in a recess 458 in the lower sec- `somewhat longer Afeed movement byl the feed tio'n 422 of the feed dog c arrieii.'l Thelug 454 on lthe stop meinber has aninclined upper face adapted lto engage acorrespond-J 'ingly' inclined face or shoulder :460 'atftlieI upper' end' the recess 458. llorn'iallyl the stopA member 446 supported by ineaiisbf an abutment screw 46,2 (lligsftaiicl S); which is threaded vertically through Athehorizontal *l portion 448 thereof, lower end of saidl screw projecting below the vportion I448l of iig,

the stop' rnember'and bearing"against a fixed` abutment. 464 (Fig. 8) on thefeed dog car# rier slide 42. The screw 462L may be turned "l to adjust the stop' meinber'446 lupwardly or downwardly to vary correspondii'igly'thetV limit to which theffeed dog i's permittedto descend. A lock "nut 466onthe screw462 bearsagainstthe adjacent portion "of the" stop member' 446 vto prevent accidental 'turning of the screw." By turning thescrew 462, the vlimit of downward movementolf ltlielfeed dog under the' influence of the spring 424 may be variedin accordance witlithe thick! ness, density vor other characteristic of `tlie" work and the extentto whicli'it is desired to:

have the"teeth 'of the feed'dog` penetrate* into the work. The range 'of vertical movement of the feed dog will be determin'ed'by 1 the relative adjustment rof thebolt 426 u51 and the screw 462, and thelupperl and lowerv limits of movement of the feed `dog may be adjiistedin accordance withtthecharacter of the work. The stopvmen'iber446lserves1to` relieve the work' from excessive |pressure .fof thejfeed'dog tending to create: i'uiduefriction between the work and the workftableVAs? feed dog` horizontally, tis designed to have a shown, theveccentrio48, which moves the soii'iewhat greater throw' than" theft'eccentric 446 "which actuate's 'thel'knives andthe presser feet and consequently, under ythe usual'c'on# ditions 'of adjustment of theconnectioiisbe-4 tween. the eccentric and the feeddogslide 42, the work' 'will 'be"advanced\ tlirougl'i' ar dog thanby they presser feet. By 'turning the bolt 426, the vertical" diameter of the orbitalpath of the yfeed dog maybe'short# en ed or vlengthened 'and consequently the horizontal diameter of the path will be moved respectively toward or from the work.`

By modifying the pathof the"feed dog iii I this mannerl the feed dogmay"berendered `capable of engaging thewor at different points in the line'of feed and oflea'i'fin'g the work at different points in the line of feed'so that more or less of the 'forward movement of the feed dog may be'mado effective to ad-1 j vance the work. "In practice'adjustment of they bolt 426 is made in accordance with the thickness of theworlto insure' 'tliat'tliellioril zontal diameter of thepath oftlie"feed dog shall be located substantial'l'y in thep'laneof the upper surface of the work' or, in other words, to insure that substantially the entire"y f rier sections.

amount of forward movement of the feed dog will be effective to feed the work, whatever the thickness of the work may be. The described construction, however, also affords aA means for varying the length of the fee-d movements imparted to the work by thefeed dog relatively to the length of feed strokes imparted to the work by the presser feet.

The horizontal reciprocating movement of the feed dog is derived from the feed dog carrier slide 42. The slide 42 is reciprocated horizontally by means of mechanism similar to that which reciprocates the knife carrier slide 38. This mechanism comprises a twoarmed lever 468 (Figs. 4 and 5) which is similar to the lever already described for actuating the knife carrier slide 38. The lever 468 has a duplex hub which is mounted to rock upon the shaft 370 and is further provided with a depending arm 474 (Figs. 1 and 6) and a shorter upwardly extending arm 476. the depending arm 474 being connected with the hub of the lever by means of a web portion 478 which is offset from said hub to avoid the depending arm of the lever which operates the knife carrier slide. The lever arm 474 is connected by means of a link 480 with the feed dog carrier slide 42, while the upwardly extending arm 476 is pivoted at 482 to an eccentric rod 484 carrying an eccentric strap 486 which encircles the eccentric 48.

In addition to the above described hori- Zontal movement of the feed dog, which is derived from the slide 42, the feed .dog is reciprocated vertically by the eccentric 50, through its operative connections with the feed dog carrier section 420, so that the desired four-way motion of the feed dog is obtained. The relative radial arrangement, of the eccentrics 48 and 50 is such that the feed dog is lowered into engagement with the work at the beginning of each forward or feed stroke and is raised to release the work during the latter part of each forward stroke. The strength. of the spring 424 is such that during the downward movement of the upper section 420 of the feed dog carrier, said spring will not yield, and consequently both the upper and lower carrier sections 420 and 422 will be lowered in unison, the spring 424 at this time acting the same as a rigid connection between the car- After the feed dog has engaged the work, the ripper carrier section 420 moves downwardly away from the head of the bolt 426, compressingT the spring 424 so that the teeth of the feed dog penetrate the work and afirm feeding hold is secured thereon. The feed stroke of the feed dog is then effected by means of the forward movement of the slide 42. At the termination of said feed stroke, the compression of the spring 424 is relieved as the upper section 420 of the feed dog carrier rises. Thereafter, when said upper carrier section 420 again engages the head 428 of the bolt 426, continued upward movement of said carrier section is positively transmitted to the lower carrier section 422 through the bolt 426 and as a result the feed dog is positively lifted from the work. The feed dog is then moved idly backward by the action of the slide 42.

It is desirable that the length of the hori- Zontal stroke of the feed dog 40 shall be varied concurrently with and proportionally to the variation of the length of stroke of the knives and presser feet when cutting around the toe or other more or less abruptly curved portions of the sole margin. Accordingly, the link 480 is connected with the depending lever arm 47 4 in the same manner as the link 360 is connected with the respective lever arm 862. As shown, the lever arm 474 is provided with an arcuate slot 488 in which is slidably received a block 490. The block 490 carries ak pin 492 which is journaled in the bifurcated rear extremity of the link 480. The link 480 is provided with a longitudinal slot 494 through which eX- tends the pin 888 which is carried by the curved arm 384. The slots 378 and 488 in the arms 362 and 474 are formed upon an arc of a circle which has the pivotal connections of said links with the respective slides 38 and 42 as a center, when said lever arms are positioned in radial alinement or, in other words, when the slides 38 and 42 are at the ends of the cutting and main feeding strokes. Inasmuch as the angular movement of the lever arms 862 and 474 is slight, it is obvious that with the above described arrangement of the slots in said arms, a minimum amount of resistance is offered to the shifting` of the blocks 380 and 490 in said slots. The slots in the lever arms 362 and 474 are of such length that the blocks mounted therein may be positioned with the pins 882 and 492 in axial alinement with the shaft 370, in which case no throw will be imparted by the lever arms to the respective slides or, in other words, the throw of the lever arms will be nullified, and consequently the work will not be fed and no movement will be imparted to the knives. rlhe eccentrics 46 and 48, being disposed diametrically opposite each other as shown, the two slides 38 and 42 and the parts carried thereby are reciprocated simultaneously in opposite directions through the c-onnections above described.

As hereinbefore indicated, the shortening of the feed stroke of the feed dog, and the shortening of the feed strokes of the knives and presser feet, facilitates the swinging of the sole, particularly at the toe thereof. Further to facilitate the swinging of the sole while the toe is being operated upon, it is desirable that the feed dog should be prelili 

